The Brother GardenersBy: Andrea Wulf One January morning in 1734, cloth merchant Peter Collinson hurried down to the docks at London's Custom House to collect cargo just arrived from John Bartram in the American colonies. But it was not bales of cotton that awaited him, but plants and seeds Over the next forty years, Bartram would send hundreds of American species to England, where Collinson was one of a handful of men who would foster a national obsession and change the